Hydraulic vibration damping system for machines provided with tools
AssigneeO&K Orenstein & Koppel Aktiengesellschaft
InventorsGuenter Broenner, Walter Kolb
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Abstract
A hydraulic system for machines provided with tools, particularly for wheel loaders, fork lifts or the like, including comprising at least one hydraulic accumulator, distributing valves, manometric switches and at least one nozzle for variably adapting the load pressure of the hydraulic accumulator to the load pressure of the lifting cylinder, wherein the load-damping system formed by the hydraulic accumulator is connected to the hydraulic lines responsible for lifting and lowering and extending between the hydraulic cylinder(s) and a control valve.
Claims8
The hydraulic system for wheel loaders provided with a shovel, comprising:
- at least one lifting cylinder;
- a control valve;
- a plurality of hydraulic lines each connected to and extending between said at least one lifting cylinder and said control valve for lifting and lowering the shovel;
- a load-dumping system comprising at least one hydraulic accumulator connected to said hydraulic lines;
- a plurality of distribution valves;
- at least one nozzle in connection with said plurality of distribution valves and located between said at least one hydraulic actuator and said at least one lifting cylinder for variably adapting a load pressure of said at least one hydraulic accumulator to a respective load pressure of said at least one lifting cylinder;
- a pilot control actuator;
- a plurality of pilot control lines connecting said pilot control actuator and said control valve;
- and
- a plurality of manometric switches each located within a respective pilot control line between said pilot control actuator and said control valve for operating said distribution valves;
- whereby said load-damping system is activated and deactivated as a function of a predetermined operating state.
Dependencies are inferred from the claim text.